<?php
#################################################################
#  Copyright notice
#
#  (c) 2013 Jérôme Schneider <mail@jeromeschneider.fr>
#  All rights reserved
#
#  http://flake.codr.fr
#
#  This script is part of the Flake project. The Flake
#  project is free software; you can redistribute it
#  and/or modify it under the terms of the GNU General Public
#  License as published by the Free Software Foundation; either
#  version 2 of the License, or (at your option) any later version.
#
#  The GNU General Public License can be found at
#  http://www.gnu.org/copyleft/gpl.html.
#
#  This script is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  This copyright notice MUST APPEAR in all copies of the script!
#################################################################


namespace Flake\Util;

abstract class Router extends \Flake\Core\FLObject {

    static $sURIPath = "";

    /* ----------------------- COMMON METHODS ------------------------------*/

    private function __construct() {
        # private constructor for static class
    }

    static function getRoutes() {
        reset($GLOBALS["ROUTES"]);
        return $GLOBALS["ROUTES"];
    }

    static function getControllerForRoute($sRoute) {
        return str_replace("\\Route", "\\Controller", self::getRouteClassForRoute($sRoute));
    }

    static function getRouteClassForRoute($sRoute) {
        $aRoutes = $GLOBALS["ROUTER"]::getRoutes();
        return $aRoutes[$sRoute];
    }

    static function getRouteForController($sController) {

        if ($sController[0] !== "\\") {
            $sController = "\\" . $sController;
        }

        $aRoutes = $GLOBALS["ROUTER"]::getRoutes();

        foreach ($aRoutes as $sKey => $sRoute) {
            if (str_replace("\\Route", "\\Controller", $sRoute) === $sController) {
                return $sKey;
            }
        }

        return false;
    }

    static function route(\Flake\Core\Render\Container &$oRenderContainer) {
        $sRouteClass = $GLOBALS["ROUTER"]::getRouteClassForRoute(
            $GLOBALS["ROUTER"]::getCurrentRoute()
        );

        $sRouteClass::layout($oRenderContainer);
    }

    static function buildRouteForController($sController, $aParams = []) {

        #$aParams = func_get_args();
        #array_shift($aParams);	# stripping $sController
        if (($sRouteForController = $GLOBALS["ROUTER"]::getRouteForController($sController)) === false) {
            throw new \Exception("buildRouteForController '" . htmlspecialchars($sController) . "': no route available.");
        }

        $aRewrittenParams = [];

        $sRouteClass = self::getRouteClassForRoute($sRouteForController);
        $aParametersMap = $sRouteClass::parametersMap();
        reset($aParametersMap);
        foreach ($aParametersMap as $sParam => $aMap) {
            if (!array_key_exists($sParam, $aParams)) {
                # if parameter not in parameters map, skip !
                continue;
            }

            $sUrlToken = $sParam;
            if (array_key_exists("urltoken", $aMap)) {
                $sUrlToken = $aMap["urltoken"];
            }

            $aRewrittenParams[$sUrlToken] = $aParams[$sParam];
        }

        #array_unshift($aParams, $sRouteForController);	# Injecting route as first param
        #return call_user_func_array($GLOBALS["ROUTER"] . "::buildRoute", $aParams);
        return $GLOBALS["ROUTER"]::buildRoute($sRouteForController, $aRewrittenParams);
    }

    static function buildCurrentRoute(/*[$sParam, $sParam2, ...]*/) {
        $aParams = func_get_args();
        $sCurrentRoute = $GLOBALS["ROUTER"]::getCurrentRoute();

        array_unshift($aParams, $sCurrentRoute);    # Injecting route as first param
        return call_user_func_array($GLOBALS["ROUTER"] . "::buildRoute", $aParams);
    }

    static function setURIPath($sURIPath) {
        static::$sURIPath = $sURIPath;
    }

    static function getUriPath() {
        return FLAKE_URIPATH . static::$sURIPath;
    }

    /* ----------------------- CHANGING METHODS ----------------------------*/

    # this method is likely to change with every Router implementation
    # should be abstract, but is not, because of PHP's strict standards
    static function buildRoute($sRoute, $aParams/* [, $sParam, $sParam2, ...] */) {

    }

    # should be abstract, but is not, because of PHP's strict standards
    static function getCurrentRoute() {

    }

    # should be abstract, but is not, because of PHP's strict standards
    static function getURLParams() {

    }
}
